EP0717541A3 - Cordless telephone system - Google Patents

Cordless telephone system Download PDF

Info

Publication number
EP0717541A3
EP0717541A3 EP95309163A EP95309163A EP0717541A3 EP 0717541 A3 EP0717541 A3 EP 0717541A3 EP 95309163 A EP95309163 A EP 95309163A EP 95309163 A EP95309163 A EP 95309163A EP 0717541 A3 EP0717541 A3 EP 0717541A3
Authority
EP
European Patent Office
Prior art keywords
unit
radio communication
section
remote
subsidiary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95309163A
Other languages
German (de)
French (fr)
Other versions
EP0717541A2 (en
EP0717541B1 (en
Inventor
Chikara Uratani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP0717541A2 publication Critical patent/EP0717541A2/en
Publication of EP0717541A3 publication Critical patent/EP0717541A3/en
Application granted granted Critical
Publication of EP0717541B1 publication Critical patent/EP0717541B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H04M1/72502—Cordless telephones with one base station connected to a single line
    • H04M1/72505—Radio link set-up procedures

Abstract

A portable telephone system includes at least one master unit connected to a telephone line, and a plurality of subsidiary units for performing radio communication with the master unit. Each subsidiary unit includes radio section, a calling information memory section, and an originating circuit section. The radio section selectively performs first radio communication with the master unit and second radio communication with a remote subsidiary unit. The calling information memory section prestores a telephone number for the telephone line which is assigned to the remote subsidiary unit in correspondence with the master unit. The originating circuit section calls the remote subsidiary unit by the second radio communication. When connection for the second radio communication cannot be performed with respect to the remote subsidiary unit, the originating circuit section automatically calls the remote subsidiary unit through the telephone line by the first radio communication in accordance with the telephone number of the remote subsidiary unit which is stored in the calling information memory section.
EP95309163A 1994-12-15 1995-12-15 Cordless telephone system Expired - Lifetime EP0717541B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP33292294 1994-12-15
JP6332922A JP2629628B2 (en) 1994-12-15 1994-12-15 Simple mobile phone device and its communication system
JP332922/94 1994-12-15

Publications (3)

Publication Number Publication Date
EP0717541A2 EP0717541A2 (en) 1996-06-19
EP0717541A3 true EP0717541A3 (en) 1998-01-07
EP0717541B1 EP0717541B1 (en) 2003-06-18

Family

ID=18260314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95309163A Expired - Lifetime EP0717541B1 (en) 1994-12-15 1995-12-15 Cordless telephone system

Country Status (5)

Country Link
US (1) US5940766A (en)
EP (1) EP0717541B1 (en)
JP (1) JP2629628B2 (en)
AU (1) AU4041195A (en)
DE (1) DE69531091T2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905956A (en) * 1996-06-25 1999-05-18 Motorola, Inc. Method for identifying active handsets in a cordless telephone system
KR100228911B1 (en) * 1997-08-14 1999-11-01 윤종용 Intercom method of tdma codeless phone
US6141531A (en) * 1997-11-26 2000-10-31 Direct Wireless Corporation Local wireless communication system with external communications link
JP2007013648A (en) * 2005-06-30 2007-01-18 Sharp Corp Radio communication system and communication terminal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935927A (en) * 1987-11-20 1990-06-19 International Mobile Machines Corporation Base station emulator
US5231635A (en) * 1990-10-09 1993-07-27 U.S. Philips Corporation Multiplexed transmission system for subscriber units of different types
WO1994005101A1 (en) * 1992-08-21 1994-03-03 Motorola, Inc. Portable to portable communications in a cordless telephone system
EP0639036A2 (en) * 1993-08-12 1995-02-15 MacNamee, Robert Joseph Gerard Cordless telephone handover system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329519A (en) * 1941-04-26 1943-09-14 Bell Telephone Labor Inc Reduction of cross talk
JP3075795B2 (en) * 1991-10-03 2000-08-14 株式会社東芝 Wireless communication device and wireless communication system
JP2710721B2 (en) * 1991-12-10 1998-02-10 シャープ株式会社 Cordless telephone that allows calls between slave units
DE69310800T2 (en) * 1992-03-31 1997-09-04 Casio Computer Co Ltd Method and device for calling a hand-held telephone in the radio telephone network
US5311571A (en) * 1992-05-14 1994-05-10 Motorola, Inc. Method and apparatus for performing inbound calling in a wireless communication system having fixed communication units coupled to a telephone system by a telephone line shared in common
JPH06209282A (en) * 1993-01-11 1994-07-26 Matsushita Electric Ind Co Ltd Cordless telephone system
JP3110217B2 (en) * 1993-08-26 2000-11-20 株式会社東芝 Mobile radio communication device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935927A (en) * 1987-11-20 1990-06-19 International Mobile Machines Corporation Base station emulator
US5231635A (en) * 1990-10-09 1993-07-27 U.S. Philips Corporation Multiplexed transmission system for subscriber units of different types
WO1994005101A1 (en) * 1992-08-21 1994-03-03 Motorola, Inc. Portable to portable communications in a cordless telephone system
EP0639036A2 (en) * 1993-08-12 1995-02-15 MacNamee, Robert Joseph Gerard Cordless telephone handover system

Also Published As

Publication number Publication date
EP0717541A2 (en) 1996-06-19
JP2629628B2 (en) 1997-07-09
US5940766A (en) 1999-08-17
EP0717541B1 (en) 2003-06-18
DE69531091D1 (en) 2003-07-24
DE69531091T2 (en) 2004-05-06
AU4041195A (en) 1996-06-20
JPH08168077A (en) 1996-06-25

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